Hi,
Hopefully, I can help. I have the same TV in my bedroom and I had the same objective as you. I currently stream content from my media server (Windows XP Pro PC actually) to various places around my home. In the lounge, I have a Roku HD1500 photobridge HD media player, it's great for pure high def content like .ts files and is brilliant with VOBs (ripped DVDs) but will not play divx or xvid. For xvid and dvix I have a modded xbox running XBMC, this lot is ethernet connected (not wifi). In my bedroom I have the Sony TV fed by a Freecom Mediaplayer (the same as the one you linked to) which takes content over the WLAN. It plays all of the divx and xvid TV shows that are about 350mb with ease, but won't play the HD divx / xvid shows that are sized at about 800mb. Also, the freecom will not play any high definition content at all. It will, however, play ripped DVDs.
So, looks like the freecom can be ruled out if your objective is to stream HD content.
Learning from my experiences, you want a single device that can do everything, it's a pain getting up to switch the xbox on for some things (you can't power it up via remote control).
Also, you're looking for a portable player? There are a few in that category, the Tvix stands out as it has a built in HDD -
http://froogle.google.co.uk/froogle?...-8&sa=N&tab=wf
Good luck, PM me if you want anymore info on the Freecom that I have, it's a great little bit of kit if all you want is to stream VOBs and standard Xvid and Divx.
Dave.